Red List of Bees: Native Bees in Decline

The table below provides a summary of status and distribution of Xerces Society Red Listed bees of North America, with links to a profile for each species. The profiles include as much information as is known about their biology and conservation. For information about using the Red List, visit this page.
To view Red Lists for other invertebrates, click here.

Status Definitions Key

PE — Possibly Extinct: Missing; known from only historical occurrences, but still some hope of rediscovery.

CI — Critically Imperiled: At very high risk of extinction due to extreme rarity (often 5 or fewer populations), very steep declines, or other factors.

I — Imperiled: At high risk of extinction due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors.

V — Vulnerable: At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors.

DD — Data Deficient: Inadequate information to make an assessment of its risk category, either through lack of knowledge of population size, threats to it, or to taxonomic uncertainty of the validity of the taxon.

Contributors

The Red List of Pollinator Insects of North America was a team effort. The lion’s share of the funding for the project was provided by the CS Fund. This project could not have been undertaken without them. Other funding was provided by members of the Xerces Society and from the Butterfly Conservation Initiative, which provided a small grant to develop profiles for the U.S. federally listed butterflies.

The Red List of Pollinator Insects of North America could not have been completed without the assistance of John Ascher from the American Museum of Natural History. John provided valuable information, advice, and direction for developing the section on native bees. We would also like to thank Karl Magnacca from the U.S. Geological Survey-Biological Resources Discipline for his help with bees in Hawaii, Robbin Thorp of University of California at Davis for his assistance with bumble bees, and Laurence Packer of York University for his assistance with several of the bee profiles. We want to thank Jaret Daniels of the McGuire Center for Lepidoptera Research for his profile on the Miami Blue. Thanks also to Xerces Society staff members Jeff Adams, Logan Lauvrey, and Ann Wawrukiewicz for help with editing and design. Abigail Hyduke from the Northwest Service Academy and Xerces volunteers Clara Elias, Amy Lambert, and Marie Elwood also provided valuable early research.

Although we did receive assistance from many people, we take full responsibility for any errors in this document.

For a full list of contributors or sources of taxonomic information, please see below.
The following scientists have all written Species Profiles and made other significant contributions to the Red List: